Battery for a mobile device



FIG. 1 is a front view of a battery for a mobile device showing our new design;

FIG. 2 is a top side view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a side view thereof;

FIG. 5 is another side view thereof; and,

FIG. 6 is a back view thereof.

The broken lines shown in FIGS. 1–6 are included for illustrative purposes only and form no part of the claimed design. The broken lines directly adjacent to shaded areas represent the boundaries of the claimed design. 

The ornamental design for a battery for a mobile device, as shown and described. 